Nonequilibrium quantum dynamics of atomic dark solitons

被引：44
|
作者：
Martin, A. D. [1 ]
Ruostekoski, J. [1 ]
机构：
[1] Univ Southampton, Sch Math, Southampton SO17 1BJ, Hants, England
来源：
NEW JOURNAL OF PHYSICS | 2010年 / 12卷
基金：
英国工程与自然科学研究理事会;
关键词：
BOSE-EINSTEIN CONDENSATE; OPTICAL LATTICE; NOISE; GASES;
D O I：
10.1088/1367-2630/12/5/055018
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the quantum dynamics of bosonic atoms that are excited to form a phase kink, or several kinks, by an imprinting potential in a one-dimensional trap. We calculate the dissipation due to quantum and thermal fluctuations in soliton trajectories, collisions and the core structure. Single-shot runs show weak filling of a soliton core, typically deeper solitons in the case of stronger fluctuations and spreading/disappearing solitons due to collisions. We also analyze a soliton system in an optical lattice that shows especially strong fluctuation-induced phenomena.
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页数：20
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